Method of treating filtering materials



Jan. 7, 1930. v, APABLASA 1,742,433

METHOD OF TREATING FILTERING MATERIALS Filed Dec. 21, 1923 INVENTOR ATTORNEY yifgwzaw w Patented Jan. 7, 1930 UNITED STATES "PATENT or-rlca JOHN V. APABLASA, 01' LOS ANGELES, CALIFORNIA, ASSIGNOB. TO 0. I. mu 8!, OI SALT LAKE CITY, UTAH METHOD OF TREATING FILTEBING MATERIALS application use December 21, ms. Serlai Io. 1,919.

This invention relates to a process and apparatus for use in reparing clay, charcoal carbon and si ar materials for use in filtering, bleaching, decolorizing and clarifying oils, aqueous solutions, sugar, syrups, fruit uices and vegetable juices and the like.

It is one of the objects of the invention to provide a process and apparatuswhereby these materials maybe prepared originally 1 as filtering and bleaching agents or revivlfied in a more economical and expeditious manner than has heretofore been possible.

Another. object of the invention is to provide a process and 'ap aratus for preparing natural'clays and eart y material foruse in filtering and bleaching oils, syrups, et c., whereby the acid and other solutions heretofore used for this purpose are conserved and a better bleaching clay with unimpaired 2o ph sical structure is produced.

arious other objects and advantages will appear as the description of the invention proceeds.

A characteristic feature of my invention or preparation of the clay by spraying the same while in a finely divided and dispersed state with a comparatively small amount of the treatment liquid.

This application is a continuation in part of my prior application, Serial No. 642,033 filed May 28, 1923. which discloses the method set forth in the present application as applied to the treatment of clays. I have now found that this method is not only applicable to the treatment of clays but also to the treatment of the other filtering materials above specified. The present application also covers an apparatus for carrying out one embodiment of the method.

In accordance with the preferred embodiment of my invention, I have illustrated on the accompanying drawing a diagrammatic layout of one form of apparatus suitable for practicing the principles of my invention.

over the prior processes of preparing clays In thQdlflWillg, 1 '-II 141 1388 8 storage bin for the crude c ay or other filtermg matenal. From the bm 1-a chute'or trough. 2 conducts the raw material to a grin mg mill 3 which may be of the ball or I pebble ty or any other, desired varligltfi adapted or fine From'the 3 the finely groun material passes through the trough 4 to a rotatingjdrum 'or chamber 5. The chamber 5 comprises a tubular body member 6 providedwith flanged ends 7 adapted to be closed,- by the stationary members 8 and Gwhich are turned over the flanges 7 as'illustrated at: 7' to makea close fitting seal for the The'ends 8' and 8 are supported upon the stat1onary supports 9 which also fprovide bear ngs for the shaft 10 c the ar wheel 11.- When suitable-power is ap ed to the pulley 12 of the shaft 10 the 6 is rotated in the ends 8 and 8" b means of the ear 11 and the gear 13 which encircles t e drum. A series of b 14 are -arranged in the drum so that the finely ground clay or other filtering material is continually carried to the top of the'drum and dropped in a fine shower or sprayto the bottom thereof. Extending through the. end of this drum is an atomizer nozzle or spray 15 by which the finely divided clay particles can be sprayed with a suitable solution to efl'ect the treatment thereof. From the mi drum 5 the moist cla passes throu h t e chute 16 to a drier 1 of any sllutab e type,d and from the drier the dried cay 1s passe again into a dmg' 18 where it is und to the i b i er size for filter1ng,. bleac g orthe like 7 and then stored 1n the bin 19 until it is desired to use the same. Suitable cut ofl means are rovided at 20 and 21 for controlling the ow of the material from the bins 1 and 19.

The treating solution, which of course, will vary with the composition of 'thecparticular clay or other filtering material bein treated and accordin to the purpose for w 'ch the I treated materials are to be used, is contained in the tank 22 from which it flows by gravity under the control of valve 23 into the tank 24.

Any suitable means may be provided for forcing the solution from the tank 24 thru the spray nozzle 15 into the drum 5. r In the embodiment illustrated this comprises anatomizer 25 controlled by a valve 26 and consisting of a pipe 27 which is supplied with compressed air from a source not shown and a suction pipe 28 which extends below the surface of the solution in the tank 24. When .the compressed air is turned into the pipe 27 by the valve 26 it sucks a portion of the solution in the tank 24 thru the pipe 28 and injects it in a fine spray thru the nozzle 15 into the drum 5.

\Vhen these clays'or other filtering materials are treated as described with the desired solution, the finely divided filtering material and the sprayed solution give a practically instantaneous reaction which results in producing a clay or filtering material having a high bleaching power and at the same'time of such physical structure as to be a most efiicient aid in filtration.

With certain clays which can be purified without using large amounts of the treatment solution it is often possible to eliminate the final grinding step, as the clay when it comes from the drier is in a sutlicientl y fine condition to be used for filtering.

While my process and apparatus is designed for use in treating clays and other filtering materials of various composition, it has been found particularly effective in treating the clay or earthmaterial located in the Red Rock Mining istrict, Kern County, California.

The term clay as used in this application, however, is to be construed in a broad sense and embraces all of the clay or earthy materials which may be found suitable for bleaching or filtering purposes. For example, it will include such substances as mont-morillonite, bauxite, kalonite, fullcrs earth, diatomaceous earths and kindred substances.

For various purposes the clays or earthy materials may be treated with different solutions which may be composed of different proportions of hydrochloric, sulphuric ornitric acid in combination with alkaline sulphites or chlorides. V g

For clays used in filtering and bleaching mineral or vegetable oils and animal fats, I have found the use of'a solution consisting of ten to eight hundred grams ofsulphuric acid, 66 B., five to fifty-five grams of sodium silicate, five to fifty grams of sodium bi-sulphite and ten to two hundred grams of water for every ten pounds of clay to be satisfactory. The solution may be sprayed upon the finely divided clay either cold or hotand may be varied in strength depending upon the particular oil or fat to be filtered and the degree to which it is to be decolorized.

Fir mineral oils alone I have found that a satisfactory treatment can be made by first spraying the proportion. of sulphuric acid terial.

above named, i. e., ten to eight hundred grams, uponthe finely divided clay'and-thenspraying the clay with ten to one hundred fifty grams of gasoline, distillate or kerosene in a cold state. y

While I have disclosed certain specific solutions which may be used in connection with certain filtering materials for carrying out my process, it isto be understood that my invention is not limited to the treatment of the clays named with these solutions, but contemplates broadly the treatment of various clay, charcoal, carbon and earthy filtering materlals b spraying the same while in a finely divide state with a suitable treatment solution.

It is apparent therefore, that various modifications and changes may be made in the par-v ticular apparatus and materials disclosed herein without departing from the spirit of the invention or the scope of the appended claims.

What I claim is: 1. The method of treating filtering and bleaching clays, which comprlses treating the material in a dry and finely divided condition with a small amount of treatment solution comprising the reaction products of sulphuric acid, sodium silicate, sodium bi-sulphite, and water, the amount of treatment solution used relative to the amount of material treated being insufiicient to cause fluidity of the ma- 2. The method of treating filtering and bleaching clays. which comprises spraying. the material while in a dry and finely divided condition with a treatment solution comprising the reaction roducts of 10 to 800 grams of sulphuric acid 5 to 55 grams of sodium silicate, 5 to 50 grams of sodium bi-sul bite, and 10 to 200 grams of water, the relative amounts varying in proportion to the amount and nature of the impurities in the material, and the amount of treatment solution used relative to the amount of material treated being insufficient to permit boiling of the material and solution.

3. The method of treating filterin and bleaching clays, WhlCh comprises reducing the filtering material to a finely divided connature to this specification.

JOHN A. APABLASA.

ams of sodium silicate, five 

